Page 47 - Design Considerations Based on Quantitative Risk Assessments for Slopes
P. 47
Quantitative Risk Assessment
Vulnerability Factor
▪ Recommended Vulnerability Factor
(Finlay et. al. , 1999 & AGS, 2000)
Case Range of Recommended Comments
Data Value
Person in open space, if struck by a 0.1 – 0.7 0.5 1.0 May be injured but unlikely to
rockfall cause death
Person in open space, if buried by 0.8 – 1.0 1.0 Death by asphyxia almost certain
debris
Person in open space, if not buried 1.0 – 0.5 0.1 High chance of survival
Person in vehicle if vehicle is 0.9 – 1.0 1.0 Death is almost certain
buried or crushed
Person in vehicle if vehicle is 0 – 0.3 0.3 High chance of survival
damaged only
Person in a building, if the building 0.9 – 1.0 1.0 Death is almost certain
collapses
Person in a building, if the building 0.8 – 1.0 1.0 Death is highly likely
is inundated with debris and the
person buried
Person in a building, if the debris 0 – 0.1 0.05 Very high chance of survival
strikes the building only
1.0 if debris-flow strike light structure
